/Engine/Source/Runtime/UMG/Public/Components/Widget.h
void SetNavigationRuleInternal ( EUINavigation Direction, EUINavigationRule Rule, [FName](API\Runtime\Core\UObject\FName) WidgetToFocus, [UWidget](API\Runtime\UMG\Components\UWidget) * InWidget, [FCustomWidgetNavigationDelegate](API\Runtime\UMG\Blueprint\FCustomWidgetNavigationDelegate) InCustomDelegate )